I’ve mentioned the first “real” magic trick that I learned was entitled Lie Detector, and it uses the Si Stebbins stack. I don’t even know if I still have the written instructions I bought nearly 25 years ago, or if they’ve been turfed in one clean out or another. Fortunately I have this trick well and truly committed to memory, and I’ve not needed to refer to the instructions for quite a few years.
The way it works is you get a volunteer to cut the deck, then take a card from anywhere in the deck and show it to everyone else (assuming there are others watching, of course). You then tell them that you’re going to ask them 3 questions about their card, and that they can choose to answer truthfully, or lie.